Question

In: Math

axis symmetry, graph max or min value, domain, range and all intervals where function increases or...

axis symmetry, graph max or min value, domain, range and all intervals where function increases or decreases. f(x)=5(x-3)^2+6 f(x)=-7(x-8)^2+1 f(x)=-6(x+4)^-8 f(x)=2(x+2)^2+9

Solutions

Expert Solution

In general if equation of parabola of the form is:

Where (h,k) is vertex of parabola

x = h is axis of symmetry.

If a is positive then parabola is opening upward.

Then vertex is minimum of that function.

If a is negative then parabola is opening downward.

Then vertex is maximum of that function.

Given function is:

On comparing

a = 5 , h = 3, k = 6

So vertex of parabola is (3,6)

Axis of symmetry is

a is positive then then it is opening upward parabola.

So there is minimum of function at vertex of parabola.

So function has minimum at x = 3 and minimum value is 6.

Parabolic function define for all real value of x.

So domain is set of all real value of x.

Range of function is:

Derivative of function is:

Function increases where

So function increases for

2.

Given function is:

On comparing

a = -7 , h = 8, k = 1

So vertex of parabola is (8,1)

Axis of symmetry is

a is negative then then it is opening downward parabola.

So there is maximum of function at vertex of parabola.

So function has maximum at x = 8 and maximum value is 1.

Parabolic function define for all real value of x.

So domain is set of all real value of x.

Range of function is:

Derivative of function is:

Function increases where

So function increases for

3.

Given function is:

On comparing

a = -6 , h = -4, k = -8

So vertex of parabola is (-4,-8)

Axis of symmetry is

a is negative then then it is opening downward parabola.

So there is maximum of function at vertex of parabola.

So function has maximum at x = -4 and maximum value is -8.

Parabolic function define for all real value of x.

So domain is set of all real value of x.

Range of function is:

Derivative of function is:

Function increases where

So function increases for


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